环境因子对杭州西湖沉积物各形态磷释放的影响

发布时间：2018-05-21 17:58

本文选题：环境因子 + 沉积物　；参考：《水生生物学报》2017年06期

【摘要】：对西湖沉积物的磷形态、粒径组成、化学组成进行了分析,模拟研究了上覆水磷含量、光照、p H、温度、水动力条件等不同环境因子对西湖沉积物各形态磷释放的影响。结果表明,上覆水为蒸馏水时的最大释磷量约为底泥-湖水系统的1.15倍,且释放形态均以IP中的Fe/Al-P为主。在蔽光条件下的最大TP释放量约为光照条件下最大TP释放量的1.35倍。p H是影响磷释放的重要因素,在碱性条件下,促进Fe/Al-P的释放;在酸性条件下,促进Ca-P的释放。在高温条件下沉积物的释磷量会高于低温条件下的释磷量。沉积物各形态磷的释放量在15h后逐渐趋于平衡扰动状态达到平衡时TP释放量是静态释放平衡状态的1.61倍。研究结果旨在探讨不同环境因子对湖泊沉积物磷迁移转化的生态环境效应,预测西湖内源磷释放的发展趋势,为控制沉积物内源污染提供理论基础。
[Abstract]:The phosphorus form, particle size composition and chemical composition of sediment in West Lake were analyzed, and the effects of different environmental factors, such as phosphorus content in overlying water, illumination pH, temperature and hydrodynamic conditions, on phosphorus release from sediments of West Lake were simulated. The results show that the maximum phosphorus release from the overlying water is about 1.15 times that of the sediment-lake water system, and the Fe/Al-P in IP is the main release form. The maximum TP release under light screening was about 1.35 times as much as the maximum TP release under light. H was an important factor affecting phosphorus release, which promoted the release of Fe/Al-P in alkaline condition and Ca-P in acidic condition. The amount of phosphorus released from sediments at high temperature is higher than that at low temperature. After 15 hours, the phosphorus release from sediments gradually tended to be in equilibrium disturbance state. The TP release amount was 1.61 times as much as that in static release equilibrium state. The purpose of the study was to investigate the ecological and environmental effects of different environmental factors on phosphorus transport and transformation in lake sediments, to predict the development trend of endogenous phosphorus release in West Lake, and to provide a theoretical basis for controlling sediment endogenous pollution.
【作者单位】：中国科学院水生生物研究所淡水生态和生物技术国家重点实验室;中国科学院大学;武汉理工大学资源与环境工程学院;
【基金】：国家自然科学基金青年基金(51709254) 中国科学院知识创新工程青年人才领域前沿项目资助~~
【分类号】：X524

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